As announced on the list (http://archives.gentoo.org/gentoo-doc/msg_e721be404c6a5ae8ce5c5bf02f45381c.xml), assume all arches are using the libata framework, so sd* everywhere. includes updating block device and partition descriptions. also added a new included file for boot config (starting sshd, hdparm, etc). synced up several wayward files, including sparc. also changed/dropped usage of some now useless keys, since everyone's using sd*. lots of intensive, invasive changes. and i never even used sed once.